1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include "namespace.h" 33 #if defined(NLS) 34 #include <nl_types.h> 35 #endif 36 #include <limits.h> 37 #include <errno.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <signal.h> 41 #include "reentrant.h" 42 #include "un-namespace.h" 43 44 #define UPREFIX "Unknown signal" 45 46 static char sig_ebuf[NL_TEXTMAX]; 47 static char sig_ebuf_err[NL_TEXTMAX]; 48 static once_t sig_init_once = ONCE_INITIALIZER; 49 static thread_key_t sig_key; 50 static int sig_keycreated = 0; 51 52 static void 53 sig_keycreate(void) 54 { 55 sig_keycreated = (thr_keycreate(&sig_key, free) == 0); 56 } 57 58 static char * 59 sig_tlsalloc(void) 60 { 61 char *ebuf = NULL; 62 63 if (thr_main() != 0) 64 ebuf = sig_ebuf; 65 else { 66 if (thr_once(&sig_init_once, sig_keycreate) != 0 || 67 !sig_keycreated) 68 goto thr_err; 69 if ((ebuf = thr_getspecific(sig_key)) == NULL) { 70 if ((ebuf = malloc(sizeof(sig_ebuf))) == NULL) 71 goto thr_err; 72 if (thr_setspecific(sig_key, ebuf) != 0) { 73 free(ebuf); 74 ebuf = NULL; 75 goto thr_err; 76 } 77 } 78 } 79 thr_err: 80 if (ebuf == NULL) 81 ebuf = sig_ebuf_err; 82 return (ebuf); 83 } 84 85 /* XXX: negative 'num' ? (REGR) */ 86 char * 87 strsignal(int num) 88 { 89 char *ebuf; 90 char tmp[20]; 91 size_t n; 92 int signum; 93 char *t, *p; 94 95 #if defined(NLS) 96 int saved_errno = errno; 97 nl_catd catd; 98 catd = catopen("libc", NL_CAT_LOCALE); 99 #endif 100 101 ebuf = sig_tlsalloc(); 102 103 if (num > 0 && num < sys_nsig) { 104 n = strlcpy(ebuf, 105 #if defined(NLS) 106 catgets(catd, 2, num, sys_siglist[num]), 107 #else 108 sys_siglist[num], 109 #endif 110 sizeof(sig_ebuf)); 111 } else { 112 n = strlcpy(ebuf, 113 #if defined(NLS) 114 catgets(catd, 2, 0xffff, UPREFIX), 115 #else 116 UPREFIX, 117 #endif 118 sizeof(sig_ebuf)); 119 120 signum = num; 121 if (num < 0) 122 signum = -signum; 123 124 t = tmp; 125 do { 126 *t++ = "0123456789"[signum % 10]; 127 } while (signum /= 10); 128 if (num < 0) 129 *t++ = '-'; 130 131 p = (ebuf + n); 132 *p++ = ':'; 133 *p++ = ' '; 134 135 for (;;) { 136 *p++ = *--t; 137 if (t <= tmp) 138 break; 139 } 140 *p = '\0'; 141 } 142 143 #if defined(NLS) 144 catclose(catd); 145 errno = saved_errno; 146 #endif 147 return (ebuf); 148 } 149